List four clues that suggest a chemical change is taking place

Why is water considered to be a complex compound?

When light propagates from a material with a given index of refraction into a material with a smaller index of refraction, the speed of the light A) incease B) decrease C) remain constant

A stationary 90 kg baseball pitcher throws a 0.15 kg baseball forward at 40 m/s. What is the linear momentum of the baseball? Select one: 0.0038 kg. m/s 3600 kg. m/s 267 kg. m/s 6 kg. m/s

A 50-cm3 block of wood is floating partially submerged in water, and a 50-cm3 block of iron is totally submerged in water. Which block has the greater buoyant force on it? A) the wood B) the iron C) Both have the same buoyant force.

A 140 g ball at the end of a string is revolving uniformly in a horizontal circle of radius 0.537 m. The ball makes 2.27 revolutions in a second. What is its centripetal acceleration?

A 2,537-kg truck moving at 14 m/s strikes a car waiting at a traffic light, hooking bumpers. The two continue to move together at 8 m/s. What was the mass (in kg) of the struck car

Which of Newton's laws accounts for the following statement? "A force cannot act alone."

Determine the maximum weight of the bucket that the wire system can support so that no single wire develops a tension exceeding 100 lb.

two objects each weighing 2kg are lifted through the same distance in 4s and 1s respectively. which scenario requires more work?

NaCI is__ an acid a base a salt